package com.it.reggie.controller;


import com.it.reggie.commen.R;
import com.it.reggie.utils.OssUtil;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

//文件的上传和下载
//@RestController
@RequestMapping("/common")
@SuppressWarnings(value = "all")
public class image {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R upLoad(MultipartFile file, HttpServletRequest request) throws IOException {

        //file是一个临时文件，需要转存到指定位置，否则本次请求完成后临时文件会删除

        //原始文件名
        String originalFilename = file.getOriginalFilename();//abc.jpg
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));

        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;//dfsdfdfd.jpg

        //创建一个目录对象
        File dir = new File(basePath);
        //判断当前目录是否存在
        if(!dir.exists()){
            //目录不存在，需要创建
            dir.mkdirs();
        }

        try {
            //将临时文件转存到指定位置
            file.transferTo(new File(basePath + fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(fileName);


       // String originalFilename = file.getOriginalFilename();
      //  assert originalFilename != null;
      //  String fileUrl = OssUtil.uploadFile(file.getInputStream(), originalFilename);
//        // 上传成功之后的文件地址 写给前端
//        ResultLayUi<String> resultLayUi = new ResultLayUi<>();
//        resultLayUi.setCode(0);
//        resultLayUi.setT(fileUrl);
        //return R.success(fileName);


    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {
        try {
            //输入流，通过输入流读取文件内容
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));

            //输出流，通过输出流将文件写回浏览器
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("image/jpeg");

            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }

            //关闭资源
            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }


    }
}
